This transcript has been automatically generated and may not be 100% accurate.

CPR Without Mouth to Mouth Still Saves Lives

Chest compression alone can increase heart victim's survival chances.

Compression-Only CPR Sometimes Better

Bystanders should stick to chest compressions, many experts say.

{"id":11274170,"title":"A Simpler CPR: No More Mouth to Mouth","duration":"2:35","description":"Two studies show lives can still be saved by chest compression alone.","section":"WNT","mediaType":"Default"}